Mutation of the putative hydrogen-bond donor to P700 of photosystem I.

@article{Li2004MutationOT,
  title={Mutation of the putative hydrogen-bond donor to P700 of photosystem I.},
  author={Yajing Li and Marie-Gabrielle Lucas and Tatyana Konovalova and Brian Abbott and Fraser MacMillan and Alexander A Petrenko and Velautham Sivakumar and Ruili Wang and Gary Hastings and Feifei Gu and Johan van Tol and Louis-Claude Brunel and Russell Timkovich and Fabrice Rappaport and Kevin E Redding},
  journal={Biochemistry},
  year={2004},
  volume={43 39},
  pages={
          12634-47
        }
}
The primary electron donor of photosystem I (PS1), called P(700), is a heterodimer of chlorophyll (Chl) a and a'. The crystal structure of photosystem I reveals that the chlorophyll a' (P(A)) could be hydrogen-bonded to the protein via a threonine residue, while the chlorophyll a (P(B)) does not have such a hydrogen bond. To investigate the influence of this hydrogen bond on P(700), PsaA-Thr739 was converted to alanine to remove the H-bond to the 13(1)-keto group of the chlorophyll a' in… CONTINUE READING
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